newforms: Fixed confusing behavior when setting choices for ChoiceFields and…

newforms: Fixed confusing behavior when setting choices for ChoiceFields and their corresponding Widgets. Now, a Widget uses the choices from its ChoiceField regardless of whether the Widget has its own choices.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@4378 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/newforms/fields.py

@@ -319,7 +319,8 @@ class BooleanField(Field):
 class ChoiceField(Field):
     def __init__(self, choices=(), required=True, widget=Select, label=None, initial=None):
         if isinstance(widget, type):
-            widget = widget(choices=choices)
+            widget = widget()
+        widget.choices = choices
         super(ChoiceField, self).__init__(required, widget, label, initial)
         self.choices = choices
 

tests/regressiontests/forms/tests.py

@@ -1830,6 +1830,42 @@ For a form with a <select>, use ChoiceField:
 <option value="J">Java</option>
 </select>
 
+You can specify widget attributes in the Widget constructor.
+>>> class FrameworkForm(Form):
+...     name = CharField()
+...     language = ChoiceField(choices=[('P', 'Python'), ('J', 'Java')], widget=Select(attrs={'class': 'foo'}))
+>>> f = FrameworkForm(auto_id=False)
+>>> print f['language']
+<select class="foo" name="language">
+<option value="P">Python</option>
+<option value="J">Java</option>
+</select>
+>>> f = FrameworkForm({'name': 'Django', 'language': 'P'}, auto_id=False)
+>>> print f['language']
+<select class="foo" name="language">
+<option value="P" selected="selected">Python</option>
+<option value="J">Java</option>
+</select>
+
+When passing a custom widget instance to ChoiceField, note that setting
+'choices' on the widget is meaningless. The widget will use the choices
+defined on the Field, not the ones defined on the Widget.
+>>> class FrameworkForm(Form):
+...     name = CharField()
+...     language = ChoiceField(choices=[('P', 'Python'), ('J', 'Java')], widget=Select(choices=[('R', 'Ruby'), ('P', 'Perl')], attrs={'class': 'foo'}))
+>>> f = FrameworkForm(auto_id=False)
+>>> print f['language']
+<select class="foo" name="language">
+<option value="P">Python</option>
+<option value="J">Java</option>
+</select>
+>>> f = FrameworkForm({'name': 'Django', 'language': 'P'}, auto_id=False)
+>>> print f['language']
+<select class="foo" name="language">
+<option value="P" selected="selected">Python</option>
+<option value="J">Java</option>
+</select>
+
 Add widget=RadioSelect to use that widget with a ChoiceField.
 >>> class FrameworkForm(Form):
 ...     name = CharField()